Convert ECW to JPS

Understanding ECW and JPS file formats

ECW (Enhanced Compression Wavelet) is a highly compressed raster image format primarily used for storing large geospatial imagery, such as satellite or aerial photographs. It is popular in GIS (Geographic Information Systems) applications due to its efficient compression and fast decompression capabilities.

JPS (JPEG Stereo) is a file format for stereoscopic 3D images. It is essentially a JPEG file that contains two side-by-side images (left and right eye views) to create a 3D effect when viewed with compatible software or hardware.

How to convert ECW to JPS

Converting an ECW file to JPS involves two main steps: first, converting the ECW image to a standard raster format (such as JPEG), and then formatting the image as a stereo pair in JPS. Since ECW is not natively supported by most image editors, you will need specialized GIS software for the initial conversion.

Recommended software for ECW to JPS conversion

• GDAL (Geospatial Data Abstraction Library): A powerful open-source library that can convert ECW files to JPEG or other raster formats. Use the gdal_translate command-line tool for this step.
• StereoPhoto Maker: After converting your ECW to JPEG, use StereoPhoto Maker to create a JPS file by combining two images (for left and right eye views) or duplicating the single image for a pseudo-3D effect. Use File → Open Left/Right Images and then File → Save Stereo Image and select JPS as the output format.

Step-by-step conversion process

1. Use GDAL to convert your ECW file to JPEG:
   gdal_translate input.ecw output.jpg
2. Open StereoPhoto Maker and load your JPEG images as left and right views.
3. Go to File → Save Stereo Image and choose JPS as the output format.

Tips and considerations

• Ensure you have two images for a true 3D JPS file. If you only have one ECW image, you can duplicate it for a pseudo-3D effect, but the result will not have real depth.
• GDAL and StereoPhoto Maker are both free and widely used in their respective fields.
• For batch conversions, both tools support command-line operations.